Corrugated plastic tube for encasing wires

A corrugated tube made of flexible plastic material for encasing lines, having circumferential peaks and troughs distributed in alternating succession over an axial length of the corrugated tube, wherein

• the peaks are each provided with a corrugation along an outer circumference of the peaks, as seen in cross section perpendicular to a longitudinal axis of the corrugated tube, the corrugation alternately forming radially projecting regions and radially recessed regions in a circumferential direction of each of the peaks, and
• the corrugated tube comprises wall sections adjacent to one another in the circumferential direction and extending axially over the length of the tube, the wall sections including first axial strips forming the radially projecting regions in the corrugation and second axial strips forming the radially recessed regions, the first axial strips and the second axial strips of the wall sections repeatedly formed, circumferentially alternately, of materials of different hardnesses.